How to be Smarter: Michael D. Lemonick of Time Magazine reported in January 2006 that "Austrian scientists reported on a study showing that the equivalent of two cups of coffee boosts short-term memory significantly." So drink up before that math test.
How to be Prettier: Strawberries are a natural teeth whitener.
How to be less Awkward: If you wave to someone, and they don't see you but someone else does, the natural reaction is to be shy and turn away. This is actually more awkward then calling their name so the intended person sees you and recognizes you. Then the bystander won't think you are creepy and awkward.